1.   He was a redoubtable debater with a caustic tongue in polemics and a nice touch in irony in writing.

2.   Can you believe these are the two most caustic tongues in Hollywood?

3.   He wears expensive suits, collects fine antiques, and is an aggressive debater with a caustic tongue.

4.   In Parliament, he has been an aggressive debater with a caustic tongue.

5.   On his daily improvised show on Radionet, Garzon played a character called Heriberto de la Calle, a humble shoeshine man with a caustic tongue.

6.   It certainly took the Australian public a long time to warm to him and his sometimes caustic tongue.